Machine for making paper bags



4 sheets-sheet 1.

(No Model.)

-F. @.BBLCHBRf MACHINE FORVMAKING .PAPER BAGS.

Patented Jan.' 25.11887.

Q2 MM 4 Sheets-(Sheet 2. l I'. G. BELGHBR. MACHINE FOR MAKING PAPER BAGS.

Patented Jan. 25, 1887.

Illlll mm mui MOO@ 6in/m. l

fwwf..

(No Model.) 4 Sheets-Sheet 3.

P. C. BELGHER. MACHINE POP. MAKING PAPER BAGS.

(No Model.) 4 Sheets-Sheet 4.

Pfc. BELGHBR.

MACHINE FOR MAKING PAPER BAGS. No. 356,441. Patented Jan. 25, 1887.

UNITED STATES PATENT OEEICE.

FRED. C. BELCHER, OF CANTON, MASSACHUSETTS.

lMACHINE FORIIVIAKING PAPER BAGS.

VYSPECIFICATION forming part of Letters Patent No. 356.441, dated January 25, 1887.

. Application filed Devemher 7. 1885. Serial No.184956. (No model.)

To ullgwtom, it may con-cern.-

Be it known thatl, FRED. C. BELCHER, of Canton., county of Norfolk, and State of Massachusetts, have invented an Improvement in Machines lor Making Paper Bags, ofwhich the following description, in connection with the accompanying drawings, is -a specification,

- like letters on the drawings representing like l bag to be made is to have a square bottom; but

it will be obvious that some of my improvements are applicable to other machines-as,

'forinstaucc,those mahiug bags having satchelbottoms.

One essential feature of my invention is a peculiar oscillating finger to enter the bottomforming opening of the tube and lay the upper ply ofthe tube back upon the top of the tube to form a sortol' diamond fold, thcnger having cooperating with it a folding-bar, which bears upon the tube at the rear of the mouthformingr opening. The linger has a rocking movement as the tube is fed continuously for ward in the production ol' the diamond fold for the bag-bottom, and eofoperating with the said linger and folding-bar are a side-closing finger and a presser-bar, which operate in succession to fold one side flap down ahead of the other, as will be hereinafter described, one side flap preferably overlapping the other. Thefohling-barhas a reciprocating movement.

The paper tube to be made into bags'is produced upon a former in usual manner, and beyfore its arrival at the inger referred to the upper ply is cut through transversely to form a lip, and thereafter both plies of the tube are provided with longitudinal slots, and then, by a third pair of rolls, both plies are cut transversely from the longitudinal slots referred to to the edges of the tube, leaving a small eentral portion of the under ply of the tube connected with a part of the tube held by feedrolls at a point beyond the lingers and devices which co-operate to fold back the upper ply to produce the bottom of the bag. After the parts of the tube have been folded to form the bottom for` a bag, the bottom is pressed between rolls,and is then pasted by a setof pasting-rolls, and then the partially-completed bottom is cross-folded, and as the rst crossfold is made the connecting portion of the lower ply of the tube is cut olf.

The particular features in which my vinvention consists will -be hereinafter more fully described, and pointed out in the claims 'at the end of this speeilication Figure lis a plan View of myimproved machine, the tube-former being partially broken away to save space on the drawing. Fig. 2 is fa longitudinal section of Fig. 1 in the line w m. Fig. 3 is an enlarged detail, chietly to show the folding-bar and the devices to operate it, the fingers (io-operating therewith being removed, a portion of the tube-former. being shown at the right of the drawing, the opening-spring connected with the tube-former being partially sl1own,.the figure being in a position the reverse of that shown in Fig. 1. Figs. 3 and 3" are details to be referred to.

Figs. 4 and 5 are enlarged details showing devices instrumental in reciprocating the folding-bar; Fig. 6, a partial side elevation of the `machine to showthe operative gearing; Fig.

7, a detail of the'roll for finally severing the bag from the tube and for making the vrst cross-fold; Fig. 7, anend View of Fig. 7,with part of the end of the roll broken out to show the blade mi. Fig. 8 represents the lower roll (3o-operating with the rolls shown in Fig. 7, the said figure also showing the cam and eamholder in position to operate the nipper. l Fig. 8a is a section of Fig. 8 iu the dotted line a?, looking toward the right, a part of the roll being broken out to better showthe construetion of the parts; Fig. 9, a detail showing the nipper removed from the roll shownin Fig. 8; Fig. 10, an enlarged detailof the bottomopening finger' and the rock-shaft carrying it; Figs. 1l and 12," details of the cam and carnholder for operating the nippev'carried bythe roll shown in Figs. 8 and 8; Fig. 13, a detail' of one of the bearings for theroek-shaft d'and lever to lock the shaft in place. Fig. 14is a section of Fig. 10 in the dotted line looking toward the right. Fig. 15 is a top view ofthe left-hand end of Fig. l0; and Figs. 16 and 16, taken together, show the different steps or operations to which the tube is subjectdinth production of a bag.

IOO

The frame-work A of the machine, of suitable shape to contain the working parts, has bearings for the main shaftA, which, by a gear, A2, thereon, cooperating with other gearing, (shown best in Figs. l and 6,) operate the ditferent rolls and movable parts of the machine.

, The main shaft A has a cam, Awhich is instrumental in operating the rock shaft orlever A, the two arms A5 of which enter slots (see Figs. 4 and 5) in the ends of two rods, a, which slide in boxes or bearings a of a plate, a2, secured to the inner side of the frame A. The plates a1 support slotted guider,y erracewaysaa, the shape ofthe slot in each being shown in Fig. 2 and in dotted lines, Fig. 4.

The slots referred to in the guides or raeeways a receive the ends of the folding-bar b, which ends are preferably provided with rolls to obviate friction in the slots. The ends of the bar b have pivoted to them links b', which in turn are pivoted upon collars b", made adjustable on the sliderods a by means of suitable set-screws, 54. (Shown bestin Fig. 3.)

As the slide-rods are moved horizontally the folding-bar is made to follow in a path coincident with or defined by, the said slots, as will be described.

-To secure great compactness in the arrangeV and quitenear the main shaft, with acrank or band at its center, as shown best in Fig. 5, in order that the cam A3, after striking the roll b, carried by the arms b5 of the said rock-shaft, may pass the line of center of the rockshaft without touching the latter, the said roll b* being carried by arms b5, attached to the said rock-shaft. The slide-rods care returned into their normal position, or so moved as to keep the roll b against the cam-A3, by suitable springs, bs. The pinion A2 on the main shaft engages anintermediate, 2, (see Fig. 6,) which in turn engages the pinion 3 lou and rotates the cam-shaft C, said camshaft having at or near each end like cams, C', one only of which is shown, (see Fig. 2;) and that one of the said cams nearest the left-hand side of the machine, supposing the operator to be standing at the receiving end of the said machine, has next to it asmall cam, C", now and hereinafter called the presser-Enger cani.7 The cams C act upon the short ends of levers c, one at eachV side the machine, which in turn act upon pins .or projections c of oii'set guide-rods c, held in bearings c and kept normally pressed down by one or more springs, c. 'These guide-rods c, above the plates a, have adjustable bearings d for the'rock-shaft d', which carries the bottom opening or forming fingers @attached to the said rock-shaft by the screw da.V The rock-shaft d has an adjustable collar, d, to which is connected one end of a spring, d5,

' while theother end of the said spring is attached to a pin, d, projecting from the bearing d, as best shown in Fig. 10.

The spring referred to acts to return the iinger d2 to its normal position when the guiderods are lifted into their highest position. The

nger d will have a rising-and-falling and a swinging movement.v

The small cam C operates a lever, e, and the latter reciprocates in one direction a rod, e', against the stress of a spring, e, the said rod sliding in guides attached to the frame-work. The rod e has adjustably secured to it the presser-finger e, which is extended from the said rod vnearly half-way across the machine, and above the paper tube t and at the rear of the finger all.

y At each side of the machine,in guides f,are guiderods f', which, above the level of the tube-former, carry the presser-bar f 2. These rods f and presser-bar are raised by suitable springs, (shown in Fig.2,) andare moved down by levers f 3, pivoted at f and acted upon by camsfs, one of which is shown bydotted lines iu Fig. 2. l

The bags to be made are cut from a paper tube, t, made by folding a web of paper about a tube-former, D, of usual construction, it having at one end a spring-tongue, D', the for ward end of which is turnednpward to lift, as

will be described, a part of the upper ply ot` paper comprising the tube at the point where it is cut through in the formation of the lips.

The gear A2 engages anintermediate gear,4, which, in engagement with the gears 5 and 6 0n the shafts of the rolls E F, serves to rotate them, and the said gears 6, through gears 7 8 on Vthe shafts ofthe rolls E' F', rotate the latter in unison with the rolls E F. An intermediate, 9, driven by the gear 5, engagesa gear, 10, on the shaft of the roll G. The gear 10 engages a gear. 12, on the shaft of aud rotates the roll G. The-tube-former D is extended forward between the rolls G G', and the s prin gtongue D is extended forward to a point in front of the rolls, when its end is turned up ward, as described, at a point beyond the folding-bar b.

The tube-former between the rolls G G is provided with a small slot, 56, (see Fig.2,) and the roll G is provided with a lipcutter, g, of usual construction, actuated by lever 60 ICO and cooperating with the said slot, the said lip-cutter meeting the upper ply of the paper tube surrounding the tube-former just above the said slot, and cutting in the same a slot, g', of substantially the shape shown in Fig. 16, to formin the upper ply of the tube an opening li pThe roll E has upon it two cutting-blades, g2, which, in the rotation of the rolls E Ef, co-,operate with a cutting block or bed, g. on the roll E, and out through both plies of the tube at opposite sides of the narrow tongue D', making two slits, g, (see Fig. 16,) which intersect the slot g. In the further forward movement of the paperA tube, as the latter passes between the rolls F F', the blade h, carried by the roll F, cooperating with the roll F', or a longitudinal slot, 62, therein, acts to sever both plies of the tube from the slots g in its most elevated position, as in-Figs. 2 and 3, close to the roll F.

The forward end of the tongue D projects towardthe delivery end of the machine to a point just beyond the right-hand side of the folding-bar b,-.(see Fig. l81",) where the said end is turned upward to act upon and lift the'lip 12in the upper ply of the, tuhef.sthat theV lower end of the bottom-opening'iinger d2 will readily pass below the said lip as the tube is moved forward by the,feedrolls E E acting thereon, the finger d acting to detain the lip part Z2 and part of the upper Aply of the tube, and at the same time the folding-bar b is moved quickly downward and toward the delivery end of the machine by the action of the cam A, as beforedescribed, and the folding-bar is Y then Vmoved forward with the tube, the result being that the upper ply of the tube is laid back, as it were, upon the lower ply, asshown in Fig. 3", and as in Fig. 16 at g.

`During the forward movement of the foldingbar the-fingcrdz, by the pressure of the paper against it, is swung forward, and the sliderods c2 are somewhat elevated, and as the folding-barb completes its forward movement, as in Fig. 3, the slide-rods c2, and -with them the rock-shaft d. and finger di, are raised, permitting the spring cl3 to act upon the rock-shaft rl,

and throw the finger di again forward into its normal position.

Just before the finger d2 is raised, as described, and just before or as the bar b is started backward by its operating-spring b, the cam C2 operates t0 throwthe presser-ngcr e3 down upon oneA half of the bottom portion of the bag, as herein shown, the half marked g7 closing the said half down quickly, as at gl", and thereafter the camsf, acting` on the le'versfi, throw down the presserfl, which extends eutirely across the portion of the paper tube folded into the shape described, and acts to lay the other half, g8, of the bottom down upon and preferably to somewhat overlap the half g7X thereof. The tube, having its upper ply folded into the form described, passes between the rollers H II I I J J K K and then between K and K2. The shaft of the roller H has upon it a gear, 13, which is driven through two intermediates, 14- and 15, actuated by the gear 6. The gear 13 engages a gear, 17, on the shaft of and rotates the roll H', and the intermediates 18, 19, and 20 and the co-opcrating gears 21, 22, 23, 24, 25, 2G, and 27 actuatcthe balance of the rollers j ust referred to.

The rolls H H' are pressi ng-ro'lls, having for their chief object to press and flatten the diamond-shaped edges of the bottom, the upper roll, H, being out away centrally, 'as at m, to

avoid twisting out of shape the central portion of the bottom lof the bag.

The rolls I I are employed bottom of the bag, the roll I having a pastingpad of 'usual construction. In practice the said pad will be provided with paste in usual manner, usually .by a trough or paste-roll working in a paste-box4v located above the roll I.

The rolls-J J serve a doublepurpose-i. e.,

they first cut off the narrow central portion, 1,.

of the lower ply which was not cut off by the rolls F F', and then, by means of a blade, m', in the roll J', they forni the first cross-fold of the bag-bottom on the line g", Fig. 16.

HA Referring to Figs. 1, 7, and 7a, the cuttingoff blade is marked m2, it entering a slot, m, (see Fig. 8,) in the under roll,-J. The under rol'l, J, has in ita nipper, m.. (Shown separately in Fig. 9 and in posit-ion in Figs` 8, 8,

for pasting the/7o and 2.) Thisnipperis made as a jaw, concaved Y at one side and cooperating with au edge, m5, (see Fig.,8i,) carried by the roll J, the blade m tueking the paper down between the nipper and the said edge. The nipper has two journallike extensions, 28. which are surrounded by springs 29, (see Fig. 8,) which are connected each at its opposite end to a part of the roll and to the nipper. The springs 29 act normally to keep the nipperm closed against the edge n. Une of the extensions 28 has fast upon ita rank-arm, 30, provided with a roll or stud, 31,'"which, in the rotation of the rollI J, acts upon a cam, 32,"conuected by bolts 33 to a cam-holder, 34, the said cam being preferably'made-in two parts, as 32 and 32", (see Figs. 11 and 12,) both of which are made adjustable with relation to each other, to cause the nipper to be opened at the proper time to permit the blade m to push the paper between the nipper and the edge m, and to` grasp and crease the paper, and then to release it, iu order that the bag-blank may be passed forward between the rolls K K between which thebagbottom receives the second cross-fold in the line g, Fig. 16. The cam-holder is supported on arms 62, attached to the frame-work A.

The roll K in practice has a blade like the one in attached to the roll J', and the roll K has in practice a nipper like the one described as carried by the roll J, the said nipper in practice being opened and closed in like man:

ner as the nipper carried by. the roll J.

The rollers J J and their cooperating mech- `auism for forming the second and final folds of the bag are otherwise of sulnitantially the saine construction and mode of operation as corresponding mechanism in the patents of W. G. Cross, No. 336,474, February 16, 1886,

No. 325,059, August 25, 1885, and No. 243,858',

July 5, 1881, to which reference is made for details.

The bag having been finished, it is delivered from the machine between the rolls K andK. The rock-shaft d', to which isattached the finger di, is cut away at one end, as'at thelcft of Fig. 10, to form a iiat bearingfa, 58,

againstwhich may act the short end of a lever, 38, pivoted at 39 on the bearing d, whenever it is desired (as when introducing the paper tube into the machine in working position) to hold the finger di out ot operative position.

The rock-shaft d', returned to its normal po sition, as described, bythespring d, has tast upon it a stop-collar, 39x, having` a toe, 40, which, when the linger arrives in its normal position, strikes against a surface, 42, of a block, 43, the said toe and block forming a positive stop.

I do not broadly claim a finger to enter the slit in a paper tube and aid in forming the mouth 0i' the bag.

The rollers employed to paste the bag and form the cross-folds are like those now einployed in machines l'or making Satchel-bottom bags. V I i The finger d2 is shown in Fig 2 by dotted lines, as iu the full-line diagram, Fig. 3.

I claim- 1. In a papenbag machine, the rolls F F and the springtongue D', combined with the nger d', the rock-shaft to which it is attached, the 'bearings for the `roekshaft, and means, substantially as described, to raise or lower the said rock-shaft.

2. In a paperbag-maehine, the rolls G G', E E', and F F', their cutting devices to cut the tube, as at g' g g5, andthe springto'ngue to enternthe tube and liftl its lip portion Z", combined with-the rods c, means, substantially as described, to move them, the bearings, the rock-shaft d', its attached finger c?, and the spring to move the roek-shait, to operate substantially as described..

3. In a paper-bag machine, rolls to feed the tube, the spring-tongue to separate the two plies of the tube, the rock-shaft d', its attached finger d1, to enter the bottoinforining opening of the tube, and the spring to move the said r0ck-shat`t, combined with the folding-bar and with the presse1-inge1, and means, snbstau` tially as described, to operate the said foldingbar and the said finger, the latter pressing one otthe side flaps of the bag downin advance of the other, substantially as described.

4. In a paper-bag machine, rolls to feed the tube, the spring-tongue to separate the two plies of the tube. the rock-shalt fl. its attached finger d, to enter the bottom-forming opening of the tube, and the spring to move the said rock-shai`t, combined with the foldingiiar, means, substantially as described, to operate ita'nd the presser-hoger and presser-bar, and means, substantially as described, to operate them, whereby the upper ply ot' the tene is laid back upon itself and the side flaps are folded down one after the other, as set. forth.

5. rlhe rotating shaft C, its attached cam C', levers c, rods c, guides c3, bearings d, roek shaft cl', its attached iinger, and the spring d5, eombined with the springiongu'e to open the tube, slotted as described, and wit-h the folding-bar and means, substantially as described, to reciprocate it.

6.. The shaft C, cam C, lever e, rod e', and attached presservtinger e, combined with the rods f', the attached presser-bar f, and the leversf" and the cams to move the said levels, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. f

FRED. C. BELCIIER.

Witnesses:

G. XV. GREGORY, C. M. GONE. 

